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June 03, 2013, 12:15:33 AM |
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Currently Bitcoin doesn't need a long history of orphan blocks with it's current network activity and hashrate. I don't think there has been a two block orphan chain since the blocksize fork or since the BIP16 forkasco.
Other Bitcoin code-based currencies may have attacks and long fork chains, and it is practical to not have a reorg limit or quickly discard orphans, because an orphan chain may become the new best again, and a flurry of unnecessary p2p activity would occur if clients had to re-download the blocks they had discarded.
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